Maximize your erection with the Maximizer Worx VX3 pump. It has a transparent cylinder made of thick and heavy acrylic with metric graduations, perfect for you to see your penis grow. At the base, a soft silicone sleeve hugs your penis and creates an airtight seal to hold it in place, maximizing comfort. . You can prolong your ejaculation by sliding the included enhancement ring on the penis until it is comfortable and well adjusted. It also has a button to operate a powerful suction motor and a quick release valve that instantly relieves pressure. Features: Automatic suction pump 3 suction speeds Silicone sheath Transparent cylinder with measurements Quick release valve 3 AAA batteries (not included) ABS Measurements: 28.5 cm x 6.2 cm